1
|
Goyal S, Singh P, Sengupta S, Muthukrishnan AB, Jayaraman G. DNA-Aptamer-Based qPCR Using Light-Up Dyes for the Detection of Nucleic Acids. ACS OMEGA 2023; 8:47277-47282. [PMID: 38107963 PMCID: PMC10719997 DOI: 10.1021/acsomega.3c07599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 11/05/2023] [Accepted: 11/16/2023] [Indexed: 12/19/2023]
Abstract
Quantitative polymerase chain reaction (qPCR) is widely used in detection of nucleic acids, but existing methods either lack sequence-specific detection or are costly because they use chemically modified DNA probes. In this work, we apply a DNA aptamer and light-up dye-based chemistry for qPCR for nucleic acid quantification. In contrast to the conventional qPCR, in our method, we observe an exponential decrease in fluorescence upon DNA amplification. The qPCR method we developed produced consistent Ct vs log10 (DNA amount) standard curves, which have a linearfit with R2 value > 0.99. This qPCR technique was validated by quantifying gene targets from Streptococcus zooepidemicus (SzhasB) and Mycobacterium tuberculosis (MtrpoB). We show that our strategy is able to successfully detect DNA at as low as 800 copies/μL. To the best of our knowledge, this is the first study demonstrating the application of light-up dyes and DNA aptamers in qPCR.
Collapse
Affiliation(s)
| | - Prashant Singh
- Department of Biotechnology,
Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
| | - Sudeshna Sengupta
- Department of Biotechnology,
Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
| | - Anantha Barathi Muthukrishnan
- Department of Biotechnology,
Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
| | - Guhan Jayaraman
- Department of Biotechnology,
Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
| |
Collapse
|
2
|
Husser C, Vuilleumier S, Ryckelynck M. FluorMango, an RNA-Based Fluorogenic Biosensor for the Direct and Specific Detection of Fluoride. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2205232. [PMID: 36436882 DOI: 10.1002/smll.202205232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 10/28/2022] [Indexed: 06/16/2023]
Abstract
Nucleic acids are not only essential actors of cell life but also extremely appealing molecular objects in the development of synthetic molecules for biotechnological application, such as biosensors to report on the presence and concentration of a target ligand by emission of a measurable signal. In this work, FluorMango, a fluorogenic ribonucleic acid (RNA)-based biosensor specific for fluoride is introduced. The molecule consists of two RNA aptamer modules, a fluoride-specific sensor derived from the crcB riboswitch which changes its structure upon interaction with the target ion, and the light-up RNA Mango-III that emits fluorescence when complexed with a fluorogen. The two modules are connected by an optimized communication module identified by ultrahigh-throughput screening, which results in extremely high fluorescence of FluorMango in the presence of fluoride, and background fluorescence in its absence. The value and efficiency of this biosensor by direct monitoring of defluorinase activity in living bacterial cells is illustrated, and the use of this new tool in future screening campaigns aiming at discovering new defluorinase activities is discussed.
Collapse
Affiliation(s)
- Claire Husser
- CNRS, Architecture et Réactivité de l'ARN, Université de Strasbourg, UPR 9002, 2 allée Konrad Roentgen, Strasbourg, 67000, France
| | - Stéphane Vuilleumier
- CNRS, Génétique Moléculaire, Génomique, Microbiologie, Université de Strasbourg, UMR 7156, 4 allée Konrad Roentgen, Strasbourg, 67000, France
| | - Michael Ryckelynck
- CNRS, Architecture et Réactivité de l'ARN, Université de Strasbourg, UPR 9002, 2 allée Konrad Roentgen, Strasbourg, 67000, France
| |
Collapse
|
3
|
de Sousa Lacerda CM, Almeida NBF, Dos Santos VCF, Plentz F, de Andrade ASR. Foot-and-mouth disease virus: DNA aptamer selection for the 3ABC protein. Virus Res 2023; 323:199008. [PMID: 36414190 PMCID: PMC10194325 DOI: 10.1016/j.virusres.2022.199008] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 10/04/2022] [Accepted: 11/18/2022] [Indexed: 11/21/2022]
Abstract
Foot-and-mouth disease (FMD) is a devastating livestock disease caused by foot-and-mouth disease virus (FMDV), a member of the Picornaviridae family. The 3ABC is a non-structural protein of FMDV, produced during viral replication and absent from inactivated FMD vaccines. Nucleic acid aptamers are DNA or RNA oligonucleotides capable of binding with high specificity and affinity to a molecular target. The aim of this study was to obtain DNA aptamers specific for 3ABC protein with a view of their application in the FMD diagnosis. Aptamers are usually obtained through SELEX (Systematic Evolution of Ligands by EXponential enrichment) procedure. In this study, an aptamer (termed FMDV1) was selected by a variation of this technique called Capillary Electrophoresis SELEX (CE-SELEX). The FMDV1 aptamer showed high binding affinity to the 3ABC protein with Kd value in the nano molar range: 22.69 ± 1.79 nM. The FMDV1 aptamer binding to 3ABC was significantly higher when compared with the BSA protein, used as control, demonstrating its specificity.
Collapse
Affiliation(s)
- Camila Maria de Sousa Lacerda
- Centro de Desenvolvimento da Tecnologia Nuclear, CDTN, Belo Horizonte, MG 31270-901, Brasil; MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Belo Horizonte, MG, Brasil
| | - Nathalie Bonatti Franco Almeida
- Centro de Desenvolvimento da Tecnologia Nuclear, CDTN, Belo Horizonte, MG 31270-901, Brasil; MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Belo Horizonte, MG, Brasil
| | - Viviane Cristina Fernandes Dos Santos
- Centro de Desenvolvimento da Tecnologia Nuclear, CDTN, Belo Horizonte, MG 31270-901, Brasil; MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Belo Horizonte, MG, Brasil
| | - Flávio Plentz
- Departamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil; MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Belo Horizonte, MG, Brasil
| | | |
Collapse
|
4
|
Almeida NBF, Sousa TASL, Santos VCF, Lacerda CMS, Silva TG, Grenfell RFQ, Plentz F, Andrade ASR. DNA aptamer selection and construction of an aptasensor based on graphene FETs for Zika virus NS1 protein detection. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2022; 13:873-881. [PMID: 36105684 PMCID: PMC9443353 DOI: 10.3762/bjnano.13.78] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 08/25/2022] [Indexed: 06/15/2023]
Abstract
Zika virus (ZIKV) is a mosquito-borne virus that is phylogenetically close to other medically important flaviviruses with high global public health significance, such as dengue (DENV) and yellow fever (YFV) viruses. Correct diagnosis of a flavivirus infection can be challenging, particularly in world regions where more than one flavivirus co-circulates and YFV vaccination is mandatory. Acid nucleic aptamers are oligonucleotides that bind to a specific target molecule with high affinity and specificity. Because of their unique characteristics, aptamers are promising tools for biosensor development. Aptamers are usually obtained through a procedure called "systematic evolution of ligands by exponential enrichment" (SELEX). In this study, we select an aptamer (termed ZIKV60) by capillary electrophoresis SELEX (CE-SELEX) to the Zika virus non-structural protein 1 (NS1) and counterselection against the NS1 proteins of DENV (serotypes 1, 2, 3, and 4) and YFV. The ZIKV60 dissociation constant (K d) is determined by enzyme-linked oligonucleotide assay (ELONA) and the aptamer specificity is evaluated by quantitative real-time polymerase chain reaction. ZIKV60 shows a high binding affinity to the ZIKV NS1 protein with a K d value of 2.28 ± 0.28 nM. The aptamer presents high specificity for ZIKV NS1 compared to NS1 of DENV and YFV. Furthermore, graphene field-effect transistor devices functionalized with ZIKV60 exhibit an evident identification of NS1 protein diluted in human serum. These results point to the applicability of biosensors based on the ZIKV60 aptamer for the differential diagnosis of the Zika virus.
Collapse
Affiliation(s)
- Nathalie B F Almeida
- Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Rua Professor José Vieira de Mendonça 770, Belo Horizonte, CEP 31310-260, Brazil
| | - Thiago A S L Sousa
- Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Rua Professor José Vieira de Mendonça 770, Belo Horizonte, CEP 31310-260, Brazil
- Current address: DTU Physics, Technical University of Denmark, Kongens Lyngby, 2800, Denmark
| | - Viviane C F Santos
- Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Rua Professor José Vieira de Mendonça 770, Belo Horizonte, CEP 31310-260, Brazil
| | - Camila M S Lacerda
- Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Rua Professor José Vieira de Mendonça 770, Belo Horizonte, CEP 31310-260, Brazil
| | - Thais G Silva
- Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Rua Professor José Vieira de Mendonça 770, Belo Horizonte, CEP 31310-260, Brazil
| | - Rafaella F Q Grenfell
- Instituto René Rachou - Fundação Oswaldo Cruz, Avenida Augusto de Lima 1715, Belo Horizonte, Minas Gerais, 30190-002, Brazil
| | - Flavio Plentz
- Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Rua Professor José Vieira de Mendonça 770, Belo Horizonte, CEP 31310-260, Brazil
| | - Antero S R Andrade
- Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
| |
Collapse
|
5
|
Huang PJJ, Liu J. A DNA Aptamer for Theophylline with Ultrahigh Selectivity Reminiscent of the Classic RNA Aptamer. ACS Chem Biol 2022; 17:2121-2129. [PMID: 35943093 DOI: 10.1021/acschembio.2c00179] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Since the report of the RNA aptamer for theophylline, theophylline has become a key molecule in chemical biology for designing RNA switches and riboswitches. In addition, theophylline is an important drug for treating airway diseases including asthma. The classic RNA aptamer with excellent selectivity for theophylline has been used to design biosensors, although DNA aptamers are more desirable for stability and cost considerations. In this work, we selected DNA aptamers for theophylline, and all the top sequences shared the same binding motifs. Binding was confirmed using isothermal titration calorimetry and a nuclease digestion assay, showing a dissociation constant (Kd) around 0.5 μM theophylline. The Theo2201 aptamer can be truncated down to 23-mer while still has a Kd of 9.8 μM. The selectivity for theophylline over caffeine is around 250,000-fold based on a strand-displacement assay, which was more than 20-fold higher compared to the classic RNA aptamer. For other tested analogs, the DNA aptamer also showed better selectivity. Using the structure-switching aptamer sensor design method, a detection limit of 17 nM theophylline was achieved in the selection buffer, and a detection limit of 31 nM was obtained in 10% serum.
Collapse
Affiliation(s)
- Po-Jung Jimmy Huang
- Department of Chemistry, Waterloo Institute for Nanotechnology University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| |
Collapse
|
6
|
Christopher JA, Geladaki A, Dawson CS, Vennard OL, Lilley KS. SUBCELLULAR TRANSCRIPTOMICS & PROTEOMICS: A COMPARATIVE METHODS REVIEW. Mol Cell Proteomics 2021; 21:100186. [PMID: 34922010 PMCID: PMC8864473 DOI: 10.1016/j.mcpro.2021.100186] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 11/16/2021] [Accepted: 12/13/2021] [Indexed: 12/23/2022] Open
Abstract
The internal environment of cells is molecularly crowded, which requires spatial organization via subcellular compartmentalization. These compartments harbor specific conditions for molecules to perform their biological functions, such as coordination of the cell cycle, cell survival, and growth. This compartmentalization is also not static, with molecules trafficking between these subcellular neighborhoods to carry out their functions. For example, some biomolecules are multifunctional, requiring an environment with differing conditions or interacting partners, and others traffic to export such molecules. Aberrant localization of proteins or RNA species has been linked to many pathological conditions, such as neurological, cancer, and pulmonary diseases. Differential expression studies in transcriptomics and proteomics are relatively common, but the majority have overlooked the importance of subcellular information. In addition, subcellular transcriptomics and proteomics data do not always colocate because of the biochemical processes that occur during and after translation, highlighting the complementary nature of these fields. In this review, we discuss and directly compare the current methods in spatial proteomics and transcriptomics, which include sequencing- and imaging-based strategies, to give the reader an overview of the current tools available. We also discuss current limitations of these strategies as well as future developments in the field of spatial -omics. Subcellular information of protein and RNA give insights into molecular function. This review discusses strategies available to measure subcellular information. Hybridization of methods shows promise for exploring the composition of organelles. Advances are aiding understanding of the organisation and dynamics of cells.
Collapse
Affiliation(s)
- Josie A Christopher
- Cambridge Centre for Proteomics, Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge, CB2 1GA, UK; Milner Therapeutics Institute, Jeffrey Cheah Biomedical Centre, Puddicombe Way, Cambridge, CB2 0AW, UK
| | - Aikaterini Geladaki
- Cambridge Centre for Proteomics, Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge, CB2 1GA, UK; Department of Genetics, University of Cambridge, 20 Downing Place, Cambridge, CB2 3EJ, UK
| | - Charlotte S Dawson
- Cambridge Centre for Proteomics, Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge, CB2 1GA, UK; Milner Therapeutics Institute, Jeffrey Cheah Biomedical Centre, Puddicombe Way, Cambridge, CB2 0AW, UK
| | - Owen L Vennard
- Cambridge Centre for Proteomics, Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge, CB2 1GA, UK; Milner Therapeutics Institute, Jeffrey Cheah Biomedical Centre, Puddicombe Way, Cambridge, CB2 0AW, UK
| | - Kathryn S Lilley
- Cambridge Centre for Proteomics, Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge, CB2 1GA, UK; Milner Therapeutics Institute, Jeffrey Cheah Biomedical Centre, Puddicombe Way, Cambridge, CB2 0AW, UK.
| |
Collapse
|
7
|
Wang L, Zhou H, Yan K, Xu P, Di B, Hu C, Su M. Using dual exonucleases to finely distinguish structural adjustment of aptamers for small-molecule detection. RSC Adv 2021; 11:32898-32903. [PMID: 35493548 PMCID: PMC9042303 DOI: 10.1039/d1ra05551h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 09/25/2021] [Indexed: 12/04/2022] Open
Abstract
The binding of small molecules to their DNA aptamers can modulate their susceptibility to digestion by exonucleases, however, absolute differentiation between digestion and inhibition has never been reported. Here, we show that the digestion of aptamers by T7 exonuclease can be completely inhibited upon binding of small-molecule targets and exploit this finding for the first time to achieve sensitive, label-free small-molecule detection. We use a quinine-binding aptamer to show that target binding entirely halts T7 exonuclease digestion, leaving behind an intact double-stranded product that retains strong target affinity. On the contrary, digestion of nontarget-bound aptamer produces a single-stranded product incapable of target binding. Exonuclease I efficiently eliminates these single-stranded products but is unable to digest the target-bound double-stranded product. The remaining products can be fluorescently quantified with SYBR Gold to determine target concentrations, giving a limit of detection of 100 nM with the linear range from 0 to 8 μM. We demonstrate the first example of a dual-exonuclease-mediated approach capable of producing a concentration-dependent response in terms of aptamer digestion modules, therefore improving performance of the current aptamer-based assay for small-molecule detection. Dual exonucleases to finely distinguish structural adjustment of aptamers to produce absolute differentiation between digestion and inhibition.![]()
Collapse
Affiliation(s)
- Lancheng Wang
- Department of Pharmaceutical Engineering, School of Engineering, China Pharmaceutical University Nanjing 211198 P. R. China
| | - Huimin Zhou
- Department of Pharmaceutical Engineering, School of Engineering, China Pharmaceutical University Nanjing 211198 P. R. China
| | - Kun Yan
- Department of Pharmaceutical Analysis, School of Pharmacy, China Pharmaceutical University Nanjing 211198 P. R. China
| | - Peng Xu
- Key Laboratory of Drug Monitoring and Control, Drug Intelligence and Forensic Center, Ministry of Public Security No. 18 Dongbeiwang West Road Beijing 100193 P. R. China
| | - Bin Di
- Department of Pharmaceutical Analysis, School of Pharmacy, China Pharmaceutical University Nanjing 211198 P. R. China
| | - Chi Hu
- Department of Pharmaceutical Engineering, School of Engineering, China Pharmaceutical University Nanjing 211198 P. R. China
| | - Mengxiang Su
- Department of Pharmaceutical Analysis, School of Pharmacy, China Pharmaceutical University Nanjing 211198 P. R. China
| |
Collapse
|
8
|
Yu H, Alkhamis O, Canoura J, Liu Y, Xiao Y. Advances and Challenges in Small‐Molecule DNA Aptamer Isolation, Characterization, and Sensor Development. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202008663] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Haixiang Yu
- Department of Chemistry and Biochemistry Florida International University 11200 SW 8th Street Miami FL 33199 USA
| | - Obtin Alkhamis
- Department of Chemistry and Biochemistry Florida International University 11200 SW 8th Street Miami FL 33199 USA
| | - Juan Canoura
- Department of Chemistry and Biochemistry Florida International University 11200 SW 8th Street Miami FL 33199 USA
| | - Yingzhu Liu
- Department of Chemistry and Biochemistry Florida International University 11200 SW 8th Street Miami FL 33199 USA
| | - Yi Xiao
- Department of Chemistry and Biochemistry Florida International University 11200 SW 8th Street Miami FL 33199 USA
| |
Collapse
|
9
|
Yu H, Alkhamis O, Canoura J, Liu Y, Xiao Y. Advances and Challenges in Small-Molecule DNA Aptamer Isolation, Characterization, and Sensor Development. Angew Chem Int Ed Engl 2021; 60:16800-16823. [PMID: 33559947 PMCID: PMC8292151 DOI: 10.1002/anie.202008663] [Citation(s) in RCA: 152] [Impact Index Per Article: 50.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 11/16/2021] [Indexed: 12/12/2022]
Abstract
Aptamers are short oligonucleotides isolated in vitro from randomized libraries that can bind to specific molecules with high affinity, and offer a number of advantages relative to antibodies as biorecognition elements in biosensors. However, it remains difficult and labor-intensive to develop aptamer-based sensors for small-molecule detection. Here, we review the challenges and advances in the isolation and characterization of small-molecule-binding DNA aptamers and their use in sensors. First, we discuss in vitro methodologies for the isolation of aptamers, and provide guidance on selecting the appropriate strategy for generating aptamers with optimal binding properties for a given application. We next examine techniques for characterizing aptamer-target binding and structure. Afterwards, we discuss various small-molecule sensing platforms based on original or engineered aptamers, and their detection applications. Finally, we conclude with a general workflow to develop aptamer-based small-molecule sensors for real-world applications.
Collapse
Affiliation(s)
- Haixiang Yu
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th Street, Miami, FL, 33199, USA
| | - Obtin Alkhamis
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th Street, Miami, FL, 33199, USA
| | - Juan Canoura
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th Street, Miami, FL, 33199, USA
| | - Yingzhu Liu
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th Street, Miami, FL, 33199, USA
| | - Yi Xiao
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th Street, Miami, FL, 33199, USA
| |
Collapse
|
10
|
Gerasimova YV, Nedorezova DD, Kolpashchikov DM. Split light up aptamers as a probing tool for nucleic acids. Methods 2021; 197:82-88. [PMID: 33992774 DOI: 10.1016/j.ymeth.2021.05.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 05/02/2021] [Accepted: 05/05/2021] [Indexed: 12/21/2022] Open
Abstract
Aptamers that bind non-fluorescent dyes and increase their fluorescence can be converted to fluorescent sensors. Here, we discuss and provide guidance for the design of split (binary) light up aptameric sensors (SLAS) for nucleic acid analysis. SLAS consist of two RNA or DNA strands and a fluorogenic organic dye added as a buffer component. The two strands hybridize to the analyzed DNA or RNA sequence and form a dye-binding pocket, followed by dye binding, and increase in its fluorescence. SLAS can detect nucleic acids in a cost-efficient label-free format since it does not require conjugation of organic dyes with nucleic acids. SLAS design is preferable over monolith fluorescent sensors due to simpler assay optimization and improved selectivity. RNA-based SLAS can be expressed in cells and used for intracellular monitoring and imaging biological molecules.
Collapse
Affiliation(s)
- Yulia V Gerasimova
- University of Central Florida, Chemistry Department, 4111 Libra Drive, Physical Sciences 255, Orlando, FL 32816-2366, United States.
| | - Daria D Nedorezova
- Laboratory of Molecular Robotics and Biosensor Materials, ChemBio Cluster, SCAMT Institute, ITMO University, 9 Lomonosova Str., Saint Petersburg 191002, Russian Federation
| | - Dmitry M Kolpashchikov
- University of Central Florida, Chemistry Department, 4111 Libra Drive, Physical Sciences 255, Orlando, FL 32816-2366, United States; Laboratory of Molecular Robotics and Biosensor Materials, ChemBio Cluster, SCAMT Institute, ITMO University, 9 Lomonosova Str., Saint Petersburg 191002, Russian Federation.
| |
Collapse
|
11
|
Connelly RP, Madalozzo PF, Mordeson JE, Pratt AD, Gerasimova YV. Promiscuous dye binding by a light-up aptamer: application for label-free multi-wavelength biosensing. Chem Commun (Camb) 2021; 57:3672-3675. [PMID: 33725073 DOI: 10.1039/d1cc00594d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Light-up DNA aptamers are promising label-free signal-transducers for biosensing applications due to their high chemical stability and low synthetic cost. Herein, we demonstrate that a dapoxyl DNA aptamer DAP-10-42 can be converted into a sensor generating a fluorescence signal at different wavelengths in the range of 500-660 nm depending on the dye that is present. This results from the discovered promiscuity of DAP-10-42 in binding fluorogenic dyes including arylmethane dyes. We have designed a split DAP-10-42 aptasensor for the detection of a katG gene fragment from Mycobacterium tuberculosis with a point mutation causing isoniazid resistance. Efficient interrogation of the gene fragment after nucleic acid sequence-based amplification (NASBA) is achieved directly in a protein-containing NASBA sample. This report lays a foundation for the application of the DAP-10-42 aptamer as a versatile sensing platform.
Collapse
Affiliation(s)
- Ryan P Connelly
- Department of Chemistry, University of Central Florida, 4111 Libra Dr, PSB 255, Orlando, Fl 32816, USA.
| | | | | | | | | |
Collapse
|
12
|
Detection of chloramphenicol with an aptamer-based colorimetric assay: critical evaluation of specific and unspecific binding of analyte molecules. Mikrochim Acta 2020; 187:668. [PMID: 33215333 DOI: 10.1007/s00604-020-04644-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 11/10/2020] [Indexed: 02/07/2023]
Abstract
A chloramphenicol (CAP)-binding aptamer of 80 nucleotides (nt) was reported in 2011. In 2014, it was truncated to 40 nt and has since been used by most researchers, although a careful binding study is still lacking. In this work, binding assays using isothermal titration calorimetry and various DNA-staining dyes were performed. By comparing the truncated aptamer with three control sequences, no specific binding of CAP was observed in each case. The secondary structures of the original and truncated aptamers were analyzed, and it was shown that the likelihood of the truncated aptamer to retain the same binding mechanism as the original sequence is low. We further examined gold nanoparticle (AuNP)-based label-free colorimetric assays. By quantifying the extinction ratio at 620 nm over that at 520 nm, a similar color response was observed regardless of the sequence of DNA, suggesting the color change mainly reflected other events such as the adsorption of CAP by the AuNPs, instead of aptamer binding to CAP. Salt-induced aggregation experiments suggested direct adsorption of CAP on AuNPs. CAP only weakly inhibited DNA adsorption by AuNPs but did not displace pre-adsorbed DNA. Therefore, CAP adsorption by AuNPs needs to be considered when designing related sensors, for example, by using non-aptamer sequences as controls. This work calls for careful confirmation of aptamer binding and control experiments for designing aptamer and AuNP-based biosensors.
Collapse
|
13
|
Damase TR, Islam MM, Shipley M, Allen PB. Thioflavin T as a noncovalent reporter for a label-free, non-enzymatic, catalytic DNA amplifier. Methods Appl Fluoresc 2020; 8:045001. [DOI: 10.1088/2050-6120/aba357] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|